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Daily build note · September 14, 2026

Agent Session Replay Lab

A local developer tool and fixed-scope debugging service that turns one buyer-supplied managed-agent NDJSON event stream into a redacted canonical cassette, validates explicit lifecycle and...

AI Tools Build note published Public demo coming soon

What shipped

The complete local workflow includes:

  • Strict two-file intake with bounded parsing and duplicate-key rejection
  • Recursive deterministic redaction using six detectors and declared literals
  • A canonical, one-record-per-line cassette
  • All 16 closed anomaly codes
  • Seven derived artifacts plus a manifest
  • An inert, self-contained replay served only on loopback
  • Staged, atomic publication and bundle replacement
  • Workspace regeneration and portable bundle validation
  • Fictional and clean fixtures, adversarial tests, and service handoff documents

Architecture

  • Standard-library modules separate intake, envelope rules, redaction, invariant evaluation, rendering, publication, validation, bundling, and serving.
  • Raw values stay on the shortest in-memory path. Only sanitized values reach candidate artifacts.
  • One immutable result model feeds every renderer. Validation independently reparses the outputs and checks their relationships.
  • Canonical JSON and NDJSON, fixed-header LF CSV, deterministic Markdown and HTML, supplied timestamps, and SHA-256 bindings prevent environmental drift.
  • Candidate directories are scanned and validated before atomic replacement, preserving the last known good output after a failure.
  • The replay embeds sanitized data, writes it through text-only DOM APIs, includes no external assets or request primitives, and exposes no action controls.

Limitations

> **Human interpretation is required.** Findings identify violations of documented invariants; they do not establish root cause.

  • A supplied stream may be incomplete, inauthentic, unsafe, or incompatible with a broader agent platform.
  • Redaction covers a fixed detector list and declared literals, not every possible secret.
  • Bundle-only validation has no raw inputs, so it cannot prove source equivalence or removal of undeclared literals.

Suggested next steps

Use the fictional session for a human walkthrough. Then test the fixed $1,500 USD upfront debugging sprint with exactly three qualified, Michael-approved offers.

Keep expansion frozen until either one sprint is paid or one qualified team supplies an authentic, authorized, sanitized stream that maps to 0.1. Treat a real mapping example as the next possible increment; live adapters, hosting, broader schemas, and licensing remain outside the current scope.